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Do you know what the demoscene is? (link)

My favourite 256 byte intro so far was the amazing Tube by 3SC. (link)

But this one sets a new standard, it’s Puls by Rrrola. (link)

Description of the effect, straight from the horse’s mouth:

What is it: implicit surfaces raymarching using binary search. The shapes get “blown up” according to step size, which fakes the ambient occlusion feel (also necessary for the bisection to work). Color is the number of missed probes minus log(last step size), which had the most bearable artifacts.